How to nerf tanks fairly.
Make tank items give negative damage stats. For example, spirit visage would have -4% damage or something, meaning that the more tank items you build, the less damage you do. This solves many problems in league, such as assassins building tank items and still oneshotting people, tanks having insane base damages and building all tank items and becoming an insane unstoppable monster, and it would also stop insane HP scalings from oneshotting people ahem chogath ahem. I seriously think this change could fix the game in its current state.